The manufacturing process of carbon film resistors utilizes carbon precipitation on magnetic rods or ceramic tubes, 

forming a layer of carbon film crystals on their surface. 

By adjusting the thickness of the carbon film and changing the degree of carbon film resistance through grooving, 

we obtain the required resistance value and apply epoxy resin on the surface to strengthen the sealing. 

The carbon film resistor is made into a color ring resistor series in appearance, 

namely the color ring carbon film resistor; The resistance range of this type of color ring resistor is 1Ω~ 10MΩ, 

Rated power includes 0.125W, 0.25W, 0.5W, 1W, etc.,

 Accuracy range:± 10%,± 5%,± 2%,

this type of carbon film resistor is generally larger in volume and is often used in some inexpensive electronic products, 

such as familiar mobile phone chargers, computer power supplies, and other electronic device circuits.